That would be the San Francisco Department of Public Works, which estimates that cleanup after this year’s event will cost taxpayers an estimated $5,000.

Recreation and Park Department employees cleaned up the mounds of scattered feathers and pillow stuffing that was left behind shortly after the event on Tuesday night. Workers steam-cleaned the sidewalk and also used a mechanical street sweeper to clean the area.

Costs of the cleanup effort were up from last year when it cost an estimated $3,500 although it was raining on Valentine’s Day in 2011. In 2010, it cost approximately $16,000.

The pillow fight is not a city-sanctioned event but it has been held for seven years now.